​MISSOULA, a city of Montana and the county-seat of Missoula co., 125 miles N. of Helena. Situated on the Missoula river and on the Chicago, Milwaukee, and St. Paul and the Northern Pacific railroads. It contains the State university, a Carnegie Library, Federal buildings, hospitals, and an excellent high school. The chief industries are farming, fruit growing, lumbering and mining, of all of which it is an important ​center. It is governed by the commission form of government. Pop. (1910) 12,869; (1920) 12,668.